TMS27C128 and TMS27PC128 are 131072-bit ultraviolet-light erasable and one-time electrically programmable read-only memories. They have various features, such as 16K×8 organization, single 5V power supply, pin compatibility with existing 128K MOS ROMs, PROMs, and EPROMs, full TTL compatibility, maximum access/minimum cycle times of 120ns, etc.
The TMS27C128 series are 131,072-bit ultraviolet-light erasable, electrically programmable read-only memories, while the TMS27PC128 series are one-time electrically programmable read-only memories. These devices utilize power-saving CMOS technology for high speed and simple interface with MOS and bipolar circuits.
| Organization | 16K x 8 |
|---|---|
| Power Supply | Single 5-V |
| Access Time (27C128-12) | 120 ns |
| Access Time (27C128-15) | 150 ns |
| Access Time (27C128-20) | 200 ns |
| Access Time (27C128-25) | 250 ns |
| Active Power Dissipation | 158 mW |
| Standby Power Dissipation | 1.4 mW |
| Noise Immunity | 400-mV |
| Latchup Immunity | 250 mA |
The organization is 16K x 8.
Programming requires a Vpp of 13.0 V and a Voc of 6.5 V.
It is erased by exposing the chip to a high intensity ultraviolet light.
The manufacturer code is 97.